Question about Onkyo TX-DS474 Receiver

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Onkyo TX-DS474 has no center speaker or surround speaker output

All the other speaker and line outputs work fine. I have followed the programming and troubleshooting instructions in the Instruction Manual and also did the microprocessor reset procedure from the service manual. I reseated all the pcb connectors and tested the speaker driver transistors for opens, shorts, and cracked solder. The customer said those outputs had been working and stopped. I am testing with my own speakers. Is there a history of this problem on this model? The way the unit is made, it will be a big job to get everything in a position where I can follow all the control and signal information with a scope.

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  • Jerry S Jul 08, 2008

    I had found a defective logic transistor that was used to drive the output select relays and that fixed that particular problem.



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1-speaker cable is not connected.
2-surround mode button is set to stereo.
3-center level is set to minimum.
4-center speaker is set to no.

Posted on Jul 07, 2008


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